SUSE-SU-2026:3480-1: important: Security update for kubevirt

Tue Aug 4 16:42:25 UTC 2026

# Security update for kubevirt

Announcement ID: SUSE-SU-2026:3480-1  
Release Date: 2026-08-04T11:42:33Z  
Rating: important  
References:

  * bsc#1266575
  * bsc#1269093
  * bsc#1271661
  * bsc#1272415

Cross-References:

  * CVE-2026-13201
  * CVE-2026-39821
  * CVE-2026-46600
  * CVE-2026-56852

CVSS scores:

  * CVE-2026-13201 ( SUSE ):  5.2 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
  * CVE-2026-13201 ( NVD ):  7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
  * CVE-2026-39821 ( SUSE ):  9.1
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-39821 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-46600 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-46600 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56852 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56852 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56852 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

  * Containers Module 15-SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves four vulnerabilities can now be installed.

## Description:

This update for kubevirt fixes the following issues:

  * Security update correcting a CVE over-claim from the previous update,
    verified by auditing the fix code actually present in the vendored tree:

  * CVE-2026-39821 (bsc#1266575): the previous entry claimed this fixed by the
    golang.org/x/net v0.55.0 re-vendor, but 0.55.0's idna fix is compile-time
    gated on Unicode 16 tables, which only exist for go1.27+ - it is inert in
    our go1.25 builds, so the claim was incorrect. Re-vendor golang.org/x/net
    v0.55.0 -> v0.57.0, whose idna package rejects all-ASCII Punycode labels
    unconditionally; the CVE is now actually fixed.

  * Re-vendor golang.org/x/text v0.37.0 -> v0.40.0: CVE-2026-56852
    (bsc#1271661), infinite loop on invalid input in unicode/norm.

  * golang.org/x/crypto v0.52.0 -> v0.54.0 (pulled in by x/net 0.57.0; no
    additional CVE claims, all previously listed x/crypto fixes remain
    included).

  * CVE-2026-13201 (bsc#1269093), safepath resolves a path whose last component
    is a symlink without detecting it, allowing metadata operations via
    /proc/self/fd to act on the symlink target. Backports of upstream
    release-1.7 commits 9ecda4ad5e and 1494cee849.

  * x/net 0.57.0 also contains the fix for CVE-2026-46600 (bsc#1272415) in
    dns/dnsmessage; kubevirt does not vendor that package (not affected), the
    bump merely rides past it.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * Containers Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Containers-15-SP7-2026-3480=1

## Package List:

  * Containers Module 15-SP7 (aarch64 x86_64)
    * kubevirt-virtctl-1.7.4-150700.3.33.1
    * kubevirt-virtctl-debuginfo-1.7.4-150700.3.33.1
    * kubevirt-manifests-1.7.4-150700.3.33.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-13201.html
  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-46600.html
  * https://www.suse.com/security/cve/CVE-2026-56852.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1266575
  * https://bugzilla.suse.com/show_bug.cgi?id=1269093
  * https://bugzilla.suse.com/show_bug.cgi?id=1271661
  * https://bugzilla.suse.com/show_bug.cgi?id=1272415

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